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Salt domes--Louisiana; University of New Orleans. Honors thesis. 1993.; University of New Orleans. Dept. of Geology and Geophysics.

Abstract/Introduction

A sample of insoluble residue from brine returns of a gas storage well collected in 1957 from Venice salt dome in Venice, Louisiana, contained two rare borate minerals: boracite and chambersite. Chambersite is known only from insoluble residues from salt domes in Louisiana and Texas. X-ray diffraction and electron microprobe studies of chambersite and other boracite-group minerals from salt. domes in Venice, Louisiana; Barber's Hill, Chambers County, Texas; and Clarke County Alabama show some correlation between cell constants and composition. Scanning electron and electron microprobe studies reveal a possible fractionation trend of increasing Mn/(Fe+Mg) ratios in chloroborates with time. The Venice, Louisiana locality, with both boracite and chambersite, is in the middle, both mineralogically and geographically, between the Alabama site and the Texas site. Backscatter scanning electron micrographs show highly complex oscillatory zoning, alternating between iron-rich areas to magnesium-rich areas in boracites from the Alabama sample.

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Degree

B.S.

Degree Program

Geology

Department

Department of Geology and Geophysics

Thesis Advisor

Simmons, William

Advisory Committee

Weber, Karen; Mooney, Michael E.

Date Degree Awarded

1993;

Rights

The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis.